US4741774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic colored crayon
Assignee: Individual
•
Filing: 1986-12-16
•
Granted: 1988-05-03
•
Expires: 2006-12-16
Abstract
Abstract A plastic colored crayon, comprises: an outer layer of plastic; and an inner, abradable, colored core comprising a mixture of ethyl hydroxyethyl cellulose, a plastic binder, wax and coloring matter.
Inventors
- 👤 Salvator Lazar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:41
CPC Classifications
C; C09; C09D; C09D13/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
44 words
A plastic colored crayon, comprising: an outer layer of plastic; and an inner, abradable, colored core comprising a mixture of ethyl hydroxyethyl cellulose, a plastic binder, wax and coloring matter; said ethyl hydroxyethyl cellulose being present from 8-30% by weight of the colored core.
Claim 2
Dependent Claim
44 words
A plastic colored crayon, comprising: an outer layer of plastic; and an inner, abradable, colored core comprising a mixture of ethyl hydroxyethyl cellulose, a plastic binder, wax and coloring matter; said ethyl hydroxyethyl cellulose being present from 8-30% by weight of the colored core.
Claim 3
Dependent Claim
19 words
The plastic colored crayon according to claim 1, wherein said mixture of the colored core further includes stearic acid.
Claim 4
Dependent Claim
22 words
The plastic colored crayon according to claim 2, wherein said stearic acid is present from 20-40% by weight of the colored core.
Claim 5
Dependent Claim
22 words
The plastic colored crayon according to claim 1, wherein said plastic binder of the colored core includes a copolymer of ethylene-vinyl alcohol.
Claim 6
Dependent Claim
20 words
The plastic colored crayon according to claim 4, wherein said plastic binder of the colored core also includes celluose acetobutyrate.
Claim 7
Dependent Claim
22 words
The plastic colored crayon according to claim 1, wherein said plastic binder of the colored core includes a polymer of isobutyl methacrylate.
Claim 8
Dependent Claim
25 words
The plastic colored crayon according to claim 1, wherein said plastic binder of the colored core is present from 5-20% by weight of the colored
Claim 9
Dependent Claim
20 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is or includes carnauba wax.
Claim 10
Dependent Claim
20 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is or includes paraffin wax.
Claim 11
Dependent Claim
20 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is or includes microcrystallin wax.
Claim 12
Dependent Claim
20 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is or includes bisamide wax.
Claim 13
Dependent Claim
23 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is or includes low molecular weight polyethylene wax.
Claim 14
Dependent Claim
26 words
The plastic colored crayon according to claim 1, wherein said wax of the colored core is present from 10-40% of the weight of the colored core.
Claim 15
Dependent Claim
21 words
The plastic colored crayon according to claim 1, wherein said outer plastic layer is or includes a copolymer of ethylene-vinyl acetate.
Claim 16
Dependent Claim
24 words
The plastic colored crayon according to claim 14, wherein said copolymer of ethylene-vinyl acetate is present from 30-50% by weight of the outer layer.
Claim 17
Dependent Claim
32 words
The plastic colored crayon according to claim 14, wherein said outer plastic layer is or includes a mixture of low viscosity copolymer of ethylene-vinyl acetate and high viscosity copolymer of ethylene-vinyl acetate.
Claim 18
Dependent Claim
16 words
The plastic colored crayon according to claim 1, wherein said outer layer further includes stearic acid.
Claim 19
Dependent Claim
21 words
The plastic colored crayon according to claim 17, wherein stearic acid is present from 15-30% by weight of the outer layer.
Claim 20
Dependent Claim
16 words
The plastic colored crayon according to claim 1, wherein said outer layer further includes a wax.
References Cited (Backward Citations)
US3639310A
Cited
US3907567A
Cited
US3769045A
Cited
US4212786A
Cited
US4351185A
Cited
US4525214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |